In a scene from National Geographic’s upcoming documentary series, Chain of Command, U.S. Army Col. Patrick Work addresses his command staff via video teleconference from a tent in an unnamed location in Iraq.

“The number one priority for us, is to protect the homeland and the American people from attack,” narrates Marine Corps Gen. Joseph Dunford, chairman of the Joint Chiefs of Staff, as the loading ramp of an aircraft raises to reveal a flightline in an unremarkable and indeterminate location.